Toothbrush



FIG. 1 is a top plan view of a toothbrush showing my new design;

FIG. 2 is a right side elevation thereof, the left elevation is a substantial mirror image of FIG. 2;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is an end elevation from the handle end; and,

FIG. 5 is an end elevation from the head end. 

The ornamental design for a toothbrush, as shown and described. 